A focus of an ellipse is at the origin. The directrix is the line x=4 and the eccentricity is \frac{1}{2}. Then the length of the semi-major axis is [AIEEE 2008]

AIEEE 2008 Solved Paper

Section: Mathematics

Question : 82 of 104

Marks: +1, -0

A focus of an ellipse is at the origin. The directrix is the line x=4 and the eccentricity is ‌

. Then the length of the semi-major axis is

[AIEEE 2008]

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